Abstract: In the present work, the preparation methods of polyurethane film based on UV light-curing reaction were discussed, using the materials of polyurethane acrylate, tri-propylene glycol diacrylate, Darocure 184 and ethyl acetate. The properties of the UV-cured film were analyzed, including wear resistance, water absorption and its solubility as well. The structure and performance of the film were also characterized by using FTIR and TGA. The characteristics of surface morphology, contact angel and tensile strength, for the coated cotton fabrics based on the UV curing method were compared, respectively. The result indicated that the UV-curing method imparted satisfactory properties to the polyurethane film, such as stability of structure at less than 300℃, acceptable fastness to sunlight, abrasion resistance, low water absorption and solubility. The contact angle for the coated cotton fabric reached to 128.6o after UV-cured reaction, meanwhile, waterproof and tensile strength were noticeably better as compared with that of the blank without finishing．

Key words: UV-curing, polyurethane, pure cotton fabric, coating finishing